stage9-10 |   
| dorsal ectoderm primordium ventral ectoderm primordium mesectoderm primordium trunk mesoderm primordium visual primordium procephalic ectoderm primordium
| | midline epidermis.
Stripes in mesoderm: beginning of somatic muscle primordium |
stage13-16 |   
  
  
  
  
  
 | embryonic/larval tracheal system embryonic optic lobe embryonic stomatogastric nervous system
| | Interesting subset of trache: only main segmental branch (this, by the way, is not in list of controlled terms!). |